Labyrinth feedback

The most unfun thing I ever saw in games. There are no puzzles. Those are just arcade elements like in mario or super meatboy. There is no thinking. And those arcade elements are not fun since the game is not made for it.
Also labyrinth is way too long. And there is nothing new or interesting after the first time you complete it. Doing it 3 times on all characters is even hard to think of.
Playing as summoner for example is also so hard. You need your summons to clear mobs but you can't see a thing sometimes.
What I suggest it to make labyrinth optional or give all 6 skill points after first (last) labyrinth run.